W-Aminoalkanesulphonic acid derivatives

ABSTRACT

New omega -aminoalkanesulphonic acid derivatives of the formula   IN WHICH R1 represents an optionally substituted C8-C22-alkyl or C8-C22alkenyl radical, R2 and R3 independently of one another denote hydrogen or C1-C2alkyl radical and R5, R6 and R7 independently of one another denote hydrogen or a C1-C6-alkyl radical, N IS 0 OR 1, X represents oxygen or sulphur, R4 denotes preferably hydrogen or C1-C6-alkyl or a cycloalkyl, aralkyl or aryl radical and Me denotes a cation, AND A PROCESS FOR THEIR MANUFACTURE. The compounds are excellent washing agents, dispersing agents, emulsifiers, softeners for textile materials and leather and mould release agents.

[451 July 8,1975

[54] w-AMINOALKANESULPHONIC ACID DERIVATIVES [75] lnventor: Gunther Boehmke, Leverkusen,

Germany [73] Assignee: Bayer Aktiengesellschaft,

Leverkusen-Bayerwerk, Germany [22] Filed: June 22, 1973 [21] Appl. No.: 372,607

[30] Foreign Application Priority Data Primary ExaminerElbert L. Roberts Attorney, Agent, or FirmPlumley & Tyner [5 7] ABSTRACT New w-aminoalkanesulphonic acid derivatives of the formula in which R represents an optionally substituted C -(l -alkyl or C -C -alkenyl radical, R and R independently of one another denote hydrogen or C,C -alkyl radical and R R and R independently of one another denote hydrogen or a C C -alkyl radical, n is 0 or 1, X represents oxygen or sulphur, R denotes preferably hydrogen or C -C -alkyl or a cycloalkyl, aralkyl or aryl radical and Me denotes a cation, and a process for their manufacture. The compounds are excellent washing agents, dispersing agents, emulsifiers, softeners for textile materials and leather and mould release agents.

6 Claims, No Drawings The invention relates to aminoalkanesulphonic acid If carboxylic acid chlorides are used for the acylation of the w-aminoalkanesulphonic acids, the Schotten- Baumann process is used, that is to say the reaction is carried out in an aqueous medium in the presence of an compounds; more particularly it concerns new amount of alkali which suffices to bind the hydrogen w-aminoalkanesulphonic acid derivatives of the fomula chloride produced. Preferably, however, the acylation is carried out with carboxylic acids because in this way salt-free acyl derivatives are obtained, in a substantially f? more advantageous space-time yield. For the acylation R, C CHCH SO,, Me with carboxylic acids, w-aminoalkanesulphonic acids CH X R l and carboxylic acids are reacted, advantageously in i I about equimolar amounts at temperatures of 100C to R5, R, R; n 300C.

The acylation of the w-aminoalkanesulphonic acids in which 5 of the formula 11 with the carboxylic acids of the for- R1 represents an Optionally Substituted w zzy mula Hi can be carried out batchwise or continuously. or C -C -alkenyI radical, in the acylation below 150C, the water formed in the 2 and 3 independently of one anothef denote yreaction is advantageously removed by azeotropic disdrogen Or a ir y radical and tillation by means ofa customary entraining agent such 5 6 and 1 indfipendenfly Of One another denote as toluene or xylene. However, the acylation takes hydrogen or a C C -alkyl .radical, place particularly advantageously if cu-aminoalkanesuln is 0 or 1, phonic acids and carboxylic acids are reacted in the X represents oxygen or sulphur, melt at 150C to 250C, preferably 180C to 220C, if 1R4 dfinotes Preferably hydrogen or C C6-a1kyl or appropriate in a protective gas atmosphere (for examcycloalkyl, aralkyl 0r aryl radical and ple under nitrogen or carbon dioxide). Me denotes a cation, The w-aminoalltanesulphonic acids to be used in the a process for their manufacture and their use as washprocess according to the invention are soluble, under ing' agents, dispersing agents, emulsifiers, softeners for the reaction-conditions, in the carboxylic acids used for textile materials and leather, and as mould release the acylation. Hence, a very smooth and complete ret action is achieved; the acylation products are distin- The compounds according to the invention, of the guished by high purity. formula 1, in which R and R represent hydrogen and Possible cations Me are above all alkali metal ions, X represents oxygen are particularly preferred; such as the sodium ion, alkaline earth metal ions, such amongst these compounds, those wherein R R and R, as the magnesium and calcium ion, and ammonium denote hydrogen have in turn proved particularly valuions, such as the ammonium or fmonoethanolamable monium, diethanolammonium or triethanolammonium The manufacturing process according to the invenion. 1 tion consists of acylating w-aminoalkanesulphonic As examples of representatives of the carboxylic' a id f th f mul acids of the formula 111 to be used in. the process ac- 40 cording to the invention there may be mentioned: capric acid, caprylic acid, undecylic acid, lauric acid, my- Fitz 3 ristic acid, stearic acid, arachidic acid, behenic acid, /.CH CH SO.,ME oleic acid, ricinoleic acid, hydroxystearic acid, dihy HN CH CH (H X R H droxystearic acid, phenylstearic acid and erucic acid; i )l acid mixtures as obtained from natural fats by saponifi- R, R 1 n cation, for example from coconut fat, palm oil, palm kernel fat, groundnut oil, soya oil, thistle oil, cottonin which I seed oil, rape oil, sunflower oil, lard or tallow.

R2, 3, 4, R5? 6 17 X and Me have the above- The compounds of the formula 11 in which R R R mentioned meaning, 11 ,11 ,12 X and n have the meaning indicated in Table with carboxylic acids or carboxylic acid chlorides of 1 b l may b mentioned as representatives f h the formula I w-aminoalkanesulphonic acids to be used in the pro- R COOH or R COCl Ill cess according to the invention:

Table 1 R2 R1, R4 R5 R6 R7 n X Me H H H H H O O Na" H H H H CH, 0 0 can H H H H (12H5 O O Na" H H H H n---C:,H 0 O Na H H H CH3 H H l O Na* H -H CH3 H H 0 O Na H H CH" H H H l O Na H -H cm, H H H l 0 Na* H H nC -,H H H H l O Na* H H nC H, H H H l O Na H H nC H H H H l O K H H Phenyl H H 0 O K H -1H H, H H 0 s 1\IH,(c,l-t,ori

H H i-C,H,, H H 0 S Na H H n-C H H H O S Na The manufacture of the w-aminoalkanesulphonic acids to be employed as starting compounds in the process according to the invention is advantageously carried out by reacting the w-hydroxyalkanesulphonic acids or their alkali salts, for example the sodium salt of B-hydroxyethan'esulphonic acid, with the appropriate alkanolamines, alkoxyalkylamines, aryloxyalkylamines or alkylmercaptoalkylamines for example ethanolamine, l-aminopropanol-(Z), l-amino-butanol-(2), 3-butoxy-propylamine, 3-Cyclohexoxy-propylamine and 3-benzyloxypropylamine, at temperatures of 180C to 220C. The reaction takes place to a degree of conversion of over 75% even under normal pressure at 180C to 190C, and can be completed to a degree of conversion of 85 to 95% of theory at 210C in an autoclave.

The crude products obtained in this way can be employed, without further purification, for the manufacture of the compounds of the formula I according to the invention. 9 Y

The m-aminoalkanesulphonic acid derivatives according to the invention, of the formula I, are excellent washing agents, especially for wool and leather, and also effective emulsifiers. Their surface activity is greater than that of the known N-acyl-nmethyl t'aurides. The activity of the compounds accordingtothe invention as dispersing agents corresponds to the activity of the known dispersing agents based on formaldehyde-arylsulphonic acid condensation products but they offer. the advantage over the latter of being biologically degradable. They furthermore have an excellent capacity for keeping suspensions of solids in water, for example pigment preparations, in a mobile consistency and repressing thixotropy. The w-aminoalkanesulphonic acid derivatives of the formula 1, according to the invention, show excellent softener propf ertie's for textiles and leath jer if R represents a C -C} alkyl or C -C -alkenyl radical.

Furthermore, the compounds according to the inventioii of the formula I which are distinguished by high temperature resistance are suitable for use as mould release agents in the manufacture of rubber and plastics articles by the compression moulding or injection moulding process.

EXAMPLE 1 280 g of stearic acid are added at 120C to a melt of 210 g of technical N-hydroxyethyltauride; the liquid reaction mixture is rapidly heated to 160C, whilst stirring, and is further heated to 180C. At this temperature, the water of reaction is distilled off whilst passing a slight stream of nitrogen over the mixture (duration, about hours). The N-stearoyl-N-hydroxyethyl-tauride is obtained in the form of a slightly yellowish wax. The acid number of the product is 5 to 7.

The solidified melt can be converted into flakes by means of a suitable device (cooled roller) or can be stirirecl with an equal amount of water to give a stiff,- easily water-soluble, paste.

The N-stearoyl-N-hydroxyethyl-tauride obtained has excellent properties as a washing agent. When used for washing cotton, a pleasant soft handle of the fabric is simultaneously achieved thereby. The compound is particularly suitable for the washing and aftertreatment of leather sincethe leather retains its full pleasantly soft handle. v

The N-hydroxyethyltauride used as the starting com pound was manufactured as follows:

148 g of hydroxyethanesulphonic acid (sodium salt) and 61 g of monoethanolamine were heated for 5 hours to 210C in an autoclave. After cooling the reaction mixture to between C and C, 18 g of water and 3 to 5 g of monoethanolamine were distilled off in vacuo. The residual N-hydroxyethyltauride was about 92 94% pure.

EXAMPLE 2 270 g of oleic acid (acid number: 207; iodine number: 80) and 210 g of 92% strength N-hydroxyethyltauride are heated to C whilst stirring. 18 g of water are distilled off over the course of 5 hours at 180 to C whilst passing in a slight stream of nitrogen. The N-oleoyl-N-hydroxyethyltauride is obtained in the form of a yellowish mass of the consistency of petroleum jelly.

The compound is outstandingly suitable for dispersing organic pigments.

The surface tension of the aqueous solution of l g of the compound/l is 0' 30.4 dyn/cm. The surface tension of an aqueous solution of 1 g/l of the known N-oleoyl-N-methyltauride is 0' 33.6 dyn/cm.

EXAMPLE 3 290 g of technical oleic acid chloride are added dropwise slowly to a 50% strength aqueous solution of l 10 g of 92% strength N-hydroxyethyltauride at 25 to 30C whilst stirring well. After about 100 g of oleic acid chloride have been added, 89 g of 45% strength sodium hydroxide solution are 'added 'di'opwisesimultaneously at a speed such that the p'H-value of the reaction mixture is 8 to 9. After completion of the reaction, the reaction product is obtained in the form of a 50% strength white paste. This is outstandingly suitable for use as a washing agent and also as a dispersing agent in dyeing liquors and for dispersing organic pigments.

EXAMPLE 4 3 to 4 hours to 210 220C. In total, 36 g of water distil off. The l I-oleoyl- N-(3-rnemoxypropylytauride is obtained in the form of a very easily water-soluble light a brown mass of theconsistency of petroleum jelly.

The compoundpossesses excellent dispersing agent properties. The surface tension the aqueous solution of 1 g/l is 0' 2915 dyn/cm;'that is to say, the product has a high surface activity. It is an effective wetting agent; wetting values (of a 1% strength aqueous solution, determined in accordance with the immersion wetting method at 60C) for W001: 9.3 seconds; for cotton: 25.8 seconds.

The determination of the foam index (by the Schlachter foam whipping method) gives a value of 1,200 cm for a solution of 1.5 g/l at 25C.

The N-(3-methoxypropyl)-tauride employed as the starting compound was manufactured by reaction of 90 g of methoxypropylamine with 150 g of hydroxyethane sulphonic acid (sodium salt) at 210C and 6 to 7 atmospheres gauge in an autoclave. The reaction product was colourless, and solid at room temperature, and contained about 7.5% of water.

EXAMPLE 5 250 g of the crude N-(3-methoxypropyl)-tauride described in Example 4 and 270 g of technical stearic acid are reacted for 3 hours at 190C and subsequently for 4 hours at 200 to 205C as described in Example 4. After distilling off about 36 g of water and cooling the reaction mixture, N-stearoyl-N-(3-methoxypropyl)- tauride is obtained in the form of a pale yellowish wax.

The compound is easily soluble in water. It is very suitable for use as a dispersing agent in the manufacture of polymer latices. 1n the rubber industry, it can be employed as an effective and heat-resistant mould release agent in hot vulcanisation.

When using the compound as a Washing agent for leather and wool, the compound is distinguished by a very good washing action and also by the fact that it imparts a full soft handle to the washed materials.

EXAMPLE 6 If 220 g of coconut fatty acid and 240 g of crude N-(3-methoxypropyl)-tauride are reacted in the manner described in Example 4, N-coconut fatty acid N-(3-methoxypropyl)-tauride is obtained. The compound results in the form of a slightly yellowish wax.

The compound is very easily soluble in water. It is an excellent washing agent for wool, leather and cotton. It is furthermore suitable for use as a dispersing agent in dyebaths when dyeing polyester fibre textile materials with dispersion dyestuffs.

EXAMPLE 7 270 g of technical oleic acid and 280 g of crude N-(3-butoxypropyl)tauride (sodium salt) are fused as described in Example 4. A total of 18 g of water are distilled from the melt by heating for 3 hours to 190 195C and subsequently heating for about 4 hours to 215C. The N-oleoyl-N-(3-butoxypropyl)-tauride obtained in this manner is a light brownish mass of the consistency of petroleum jelly which has an acid number of about 4 and is very easily soluble in water.

The excellent dispersing properties of the compound can be seen from the following dispersing experiments:

1. The addition of 3% of N-oleoyl-N-(3-butoxyprOpyU-tauride (relative to zinc oxide) to a 5% strength dispersion of a finely divided zinc oxide gives a finely divided dispersion which is still stable even after standing for 24 hours. Without the addition of the dispersing agent, the zinc oxide flocculates from the dispersion already after minutes.

2. A 50% strength mixture of a finely divided zinc oxide with water is a stiff crumbly mass which cannot be stirred. If 5% of N-oleoyl-N-(3-butoxypropyl)- tauride (relative to zinc oxide) is added thereto, a mobile suspension is obtained, which can be diluted with out difficulties to give a stable dispersion.

EXAMPLE 8 270 g of technical oleic acid and 230 g of N-(2-hydroxypropyl)-tauride (approximately strength crude product) are fused whilst stirring, under a nitrogen atmosphere. 18 g of water are distilled from the clear melt by heating to 180C for 3 hours and subsequently heating to 210C for 3 hours. After cooling the reaction mixture, N-oleoyl-N-(2-hydroxypropyl)- tauride is obtained in the form of a yellowish mass of the consistency of petroleum jelly.

The compound is suitable for use as a dispersing agent and washing agent.

The N-(2-hydroxypropyl)-tauride employed as the starting compound was manufactured by heating g of hydroxyethanesulphonic acid (sodium salt) and 75 g of 2-hydroxypropylamine-(l) for 7 hours to 205 210C under 5 to 6 atmospheres gauge pressure. After cooling the reaction mixture to 150 C, 18 g of water were distilled from it.

We claim:

11. New w-aminoalkanesulphonic acid derivatives of the formula ia H (CH) X--R4 a L7 n in which R represents an optionally substituted C,,C -a]kyl or C C -all enyl radical,

R and R independently of one another denote hydrogen or a C C -alkyl radical and R R and R independently of one another denote hydrogen or a C C -alkyl radical,

n is 0 or 1,

X represents oxygen or sulphur,

R denotes hydrogen, a C C -aIkyl, cycloalkyl, aral kyl or an aryl radical and Me denotes a cation 2. w-Aminoalkanesulphonic acid derivatives according to claim 11, wherein R and R are hydrogen and X is oxygen.

3. w-Aminoalkanesulphonic acid derivatives according to claim 11, wherein R R R R, and R are hydro gen, R is hydrogen or C C -alkyl and X is oxygen.

4. The w-aminoalkanesulphonic acid of claim 1 in which R, is hydrogen, C C -all yl, cyclohexyl, phenyl or benzyl.

5. The w-aminoalkanesulphonic acid derivative of claim 11 in which R, is C C -alkyl; C C -alkenyl; or c -C -alkyl or alkenyl substituted with hydroxyl or phenyl;

R and R independently of one another are hydrogen R R and R independently of one another are hydrogen or C C -all yl;

n is 0 or 1;

X is oxygen or sulphur;

Me is a cation; and

R is hydrogen, C C -alkyl, cyclohexyl, phenyl or benzyl.

6. The w-aminoalkanesulphonic acid derivative of claim 11 in which X is oxygen. 

1. NEW W-AMINOALKANESULPHONIC ACID DERIVATIVES OF THE FORMULA
 2. omega -Aminoalkanesulphonic acid derivatives according to claim 1, wherein R2 and R3 are hydrogen and X is oxygen.
 3. omega -Aminoalkanesulphonic acid derivatives according to claim 1, wherein R2, R3, R5, R6 and R7 are hydrogen, R4 is hydrogen or C1-C6-alkyl and X is oxygen.
 4. The omega -aminoalkanesulphonic acid of claim 1 in which R4 is hydrogen, C1-C6-alkyl, cyclohexyl, phenyl or benzyl.
 5. The omega -aminoalkanesulphonic acid derivative of claim 1 in which R1 is C8-C22-alkyl; C8-C22-alkenyl; or C8-C22-alkyl or alkenyl substituted with hydroxyl or phenyl; R2 and R3 independently of one another are hydrogen or C1-C2-alkyl; R5, R6 and R7 independently of one another are hydrogen or C1-C6-alkyl; n is 0 or 1; X is oxygen or sulphur; Me is a cation; and R4 is hydrogen, C1-C6-alkyl, cyclohexyl, phenyl or benzyl.
 6. The omega -aminoalkanesulphonic acid derivative of claim 1 in which X is oxygen. 